robert76 - 11:45 am on Jan 28, 2012 (gmt 0)
I can show an interesting example of such phenomena. I've been monitoring it for months on one such multi-domain site. In this case though there is virtually no difference between the sites other than the name. You can search virtually anything this site contains (and it contains hundreds of thousands of things) and you will find results that stretch many pages long, each one to a different domain of theirs.
I've been trying to figure out how they are achieving this since Panda should have considered this duplicate and put an end to it but rather it keeps on growing. In fact one striking feature is that with Panda 1.0 traffic went up at what might be considered the main site and then continued going up thereafter.
I don't know if these results have been achieved via luck, skill, or trickery but the site has been so successful since Panda that at the end of last month the operation was acquired by one of the two largest home improvement chains in the US.
I just now pulled a search phrase at random and it returns one of their sites in every one of the first 8 pages of results. Moderator, is it ok to use an example search phrase to demonstrate?